WASHINGTON (AP) -- President Barack Obama is holding a video conference with European leaders to discuss their push for peace in Ukraine and other global security issues.

The White House says other leaders planning to be on the Tuesday morning call include British Prime Minister David Cameron, French President Francois Hollande, German Chancellor Angela Merkel, Italian Prime Minister Matteo Renzi and European Council President Donald Tusk.

Obama will participate from the White House's secure Situation Room.

Fighting has waned substantially in eastern Ukraine in recent days as a cease-fire deal forged last month increasingly takes effect. But both sides have complained of sporadic violations.

The U.N. human rights office on Monday raised its toll of the fighting, saying more than 6,000 people have died since the conflict with Russian-backed separatists began in April.